Top collision prevention device for electric hoist
By installing anti-rush top collision device on the electric hoist and triggering the stroke limit switch with the collision block and guide device, the collision problem caused by insufficient safety distance of the electric hoist limiter is solved, and the effect of preventing damage and safety accidents is achieved.
Patent Information
- Application Number
- CN202421883499.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-06
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-06
AI Technical Summary
When the electric hoist is lifting heavy objects, the safety distance between the limiter and the electric hoist box is too short, and it is easy to collide, resulting in deformation of the box, rupture of the reducer, and even safety accidents.
An electric hoist anti-rush top collision device is designed, including a base, a stroke limit switch, a guide device and a collision block. The impact block drives the guide device to rise, triggers the stroke limit switch, disconnects the control circuit, and prevents the electric hoist from continuing to rise.
Effectively prevent the collision between the electric hoist and the box and reel device, avoid damage and safety accidents, the structure is simple, the design is reasonable, the stability is good, and the safety is reliable.
Smart Images
Figure CN222989651U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of lifting tools, and more particularly, to an anti-overhead collision device for an electric hoist. Background Art
[0002] Electric hoists are extremely widely used as standard lifting tools at work sites. When using an electric hoist to lift a heavy object upwards, due to incorrect operation methods of the operator or the easy adhesion of the circuit breaker contacts during use; once adhered, it causes the hook device to continuously rise. Since the effective safety distance between the limit switch and the electric hoist housing is too short, it takes a long time for the operator to cut off the power supply, resulting in the hook device colliding with the electric hoist housing and the drum device, causing deformation of the housing and rupture of the reducer, and even causing other safety accidents, and it is relatively difficult to repair the damaged wire guide.
[0003] In view of this, the present application aims to provide an anti-overhead collision device for an electric hoist to better solve the above technical problems. Summary of the Invention
[0004] The purpose of the embodiments of the present application is to provide an anti-overhead collision device for an electric hoist, which can solve the technical problem of the electric hoist hitting the top and colliding.
[0005] The embodiments of the present application provide an anti-overhead collision device for an electric hoist, including a base, a travel limit switch, a guiding device, and a bumper. The base is installed on the fixed end steel wire rope of the electric hoist housing to be collision-proof. The travel limit switch is installed on the base and connected to the main power supply box of the electric hoist to be collision-proof to form a control circuit. The guiding device is installed on the fixed end steel wire rope of the electric hoist housing to be collision-proof, below the base, and is flexibly connected to the travel limit switch. The bumper is installed above the hook housing of the electric hoist to be collision-proof, below the guiding device, and is used to collide and contact with the guiding device, drive the guiding device to rise, and impact and trigger the travel limit switch.
[0006] Further, the travel limit switch is provided with a switch connecting rod, and the guiding device is flexibly connected to the switch connecting rod.
[0007] Further, the guiding device is flexibly connected to the switch connecting rod through a flexible steel wire rope.
[0008] Further, the bumper is welded above the hook housing of the electric hoist to be collision-proof.
[0009] Further, the guiding device includes a sleeve and a connecting plate. The sleeve is movably sleeved on the fixed end steel wire rope of the electric hoist housing to be collision-proof, and the connecting plate is welded on the sleeve.
[0010] Further, the casing is formed by combining and splicing two semi-circular arc blocks. After the two semi-circular arc blocks are combined and spliced, they are fixedly connected by a bolt structure.
[0011] Further, the base is fixedly installed on the wire rope at the fixed tail end of the electric hoist box to be collision-proof through a U-bolt.
[0012] Advantages of the present utility model:
[0013] The electric hoist anti-overhead collision device provided by the present utility model includes a base, a travel limit switch, a guiding device and a collision block. The base is installed on the wire rope at the fixed tail end of the electric hoist box to be collision-proof. The travel limit switch is installed on the base and connected to the main power supply box of the electric hoist to be collision-proof to form a control circuit. The guiding device is installed on the wire rope at the fixed tail end of the electric hoist box to be collision-proof, below the base, and is flexibly connected to the travel limit switch. The collision block is installed above the hook housing of the electric hoist to be collision-proof, below the guiding device, and is used to collide and contact with the guiding device, drive the guiding device to rise, and impact and trigger the travel limit switch. The structure of the present utility model is simple and reasonable in design. The collision block drives the guiding device to freely move up and down on the wire rope at the fixed tail end of the hoist housing to trigger the travel limit switch. Its swing is small, the stability is good, and it is safe and reliable. Description of the Drawings
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0015] Figure 1 It is an installation schematic diagram of the present utility model;
[0016] Figure 2 is Figure 1 A partial enlarged view at C;
[0017] Figure 3 It is a schematic structural diagram of the guiding device in some embodiments of the present utility model.
[0018] The reference numerals are respectively:
[0019] Base 1, travel limit switch 2, switch connecting rod 21, guiding device 3, casing 31, connecting plate 32, collision block 4, flexible wire rope 5, U-bolt 6, wire rope at the tail end -A, hook housing -B. Detailed Embodiments
[0020] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are some but not all of the embodiments of this application. Components of the embodiments of this application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.
[0022] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0023] In the description of this application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of this application are customarily placed during use. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.
[0024] In addition, terms such as "horizontal", "vertical", "overhanging", etc. do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.
[0025] In the description of this application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.
[0026] See Figures 1-3As shown in the figure, the anti-overtravel collision device of the electric hoist described in this embodiment includes a base 1, a travel limit switch 2, a guiding device 3, and a bumper 4. The base 1 is installed on the fixed end wire rope of the electric hoist box body to be protected against collision. The travel limit switch 2 is installed on the base 1 and connected to the main power box of the electric hoist to be protected against collision to form a control circuit. The guiding device 3 is installed on the fixed end wire rope of the electric hoist box body to be protected against collision, below the base 1, and is flexibly connected to the travel limit switch 2. The bumper 4 is installed above the hook shell of the electric hoist to be protected against collision, below the guiding device 3, and is used to collide and contact with the guiding device 3 to drive the guiding device 3 to rise and trigger the travel limit switch 2 by impact.
[0027] The structure of this embodiment is simple and reasonably designed. The bumper 4 drives the guiding device 3 to move freely up and down on the wire rope at the fixed end of the hoist shell to trigger the travel limit switch 2. Its swing is small, with good stability, and is safe and reliable.
[0028] Specifically, the anti-overtravel collision device in this embodiment is less affected by external factors and is not affected by the up, down, left, and right movement of the wire rope on the rope drum. When the electric hoist is lifting a heavy object at a constant speed and rises to a certain height, the bumper 4 welded on the hook collides and contacts with the guiding device 3. The bumper 4 on the hook pushes the guiding device to continue rising. When it travels a certain displacement, the guiding device 3 impacts the travel limit switch 2, the travel limit switch 2 is triggered, and the control circuit is disconnected, stopping the moving electric hoist to prevent damage to the electric hoist. It is particularly suitable for electric hoists below 10 tons.
[0029] In some embodiments, the travel limit switch 2 is provided with a switch connecting rod 21, and the guiding device 3 is flexibly connected to the switch connecting rod 21.
[0030] Specifically, the guiding device 3 is flexibly connected to the switch connecting rod 21 through a flexible wire rope 5.
[0031] In this embodiment, the flexible wire rope 5 is used for the flexible connection of the switch connecting rod 21 of the travel limit switch 2, which is convenient for adjusting the safe distance between the hook and the hoist rope drum, so as to avoid the problem that the distance between the original wire rope guide of the electric hoist and the rope drum is too close. In case of an emergency, there is no relative disposal time, resulting in damage to the electric hoist and even more serious equipment safety accidents.
[0032] In some embodiments, the bumper 4 is welded above the hook shell of the electric hoist to be protected against collision.
[0033] In this embodiment, it is specifically shown that the striking block 4 is welded above the hook housing. Its structure is simple and the connection stability is good. Specifically, the striking block 4 needs to be welded above the housing (within the radius range) of the electric hoist hook. The actual size of the striking block 4 can be specifically determined according to the size of the hook.
[0034] In some embodiments, the guiding device 3 includes a sleeve 31 and a connecting plate 32. The sleeve 31 is movably sleeved on the steel wire rope at the fixed tail end of the electric hoist box to be collision-proof, and the connecting plate 32 is welded on the sleeve 31.
[0035] Specifically, the sleeve 31 is formed by combining and splicing two semi-circular arc blocks. After the two semi-circular arc blocks are combined and spliced, they are screwed and fixed by a bolt structure.
[0036] In this embodiment, the structural setting of the guiding device 3 therein is specifically shown. Its structure is simple and it is convenient to set it on the steel wire rope at the fixed tail end of the electric hoist box. Here, the diameter of the sleeve 31 is slightly larger than the diameter of the steel wire rope to achieve smooth sliding, and thus it is convenient to rise with the striking block 4 to trigger the impact of the travel limit switch 2.
[0037] In some embodiments, the base 1 is fixedly installed on the steel wire rope at the fixed tail end of the electric hoist box to be collision-proof through a U-shaped bolt 6.
[0038] In this embodiment, the base 1 is installed and fixed through the U-shaped bolt 6. Its structure is simple, convenient for disassembly and assembly, and the connection stability is good.
[0039] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. An electric hoist anti-top collision device, characterized in that: It includes a base, a travel limit switch, a guide device and a collision block. The base is installed on the fixed tail end wire rope of the electric hoist box to be prevented from collision. The travel limit switch is installed on the base and connected to the main power supply box of the electric hoist to be prevented from collision to form a control loop. The guide device is installed on the fixed tail end wire rope of the electric hoist box to be prevented from collision, is located below the base, and is flexibly connected to the travel limit switch. The collision block is installed above the hook housing of the electric hoist to be prevented from collision and is located below the guide device. It is used to collide with and contact the guide device, drive the guide device to rise, and hit and trigger the travel limit switch.
2. The electric hoist anti-top collision device according to claim 1 is characterized in that: The travel limit switch is provided with a switch connecting rod, and the guide device is flexibly connected to the switch connecting rod.
3. The electric hoist anti-top collision device according to claim 2 is characterized in that: The guide device is flexibly connected to the switch connecting rod through a flexible steel wire rope.
4. The electric hoist anti-top collision device according to claim 1, characterized in that: The collision block is welded and arranged above the hook housing of the electric hoist to be prevented from collision.
5. The electric hoist anti-top collision device according to claim 1 is characterized in that: The guide device comprises a sleeve and a connecting plate. The sleeve is movably sleeved on the steel wire rope at the fixed tail end of the electric hoist box to be prevented from collision, and the connecting plate is welded on the sleeve.
6. The electric hoist anti-top collision device according to claim 5, characterized in that: The sleeve is formed by combining and splicing two semicircular arc blocks. After the two semicircular arc blocks are combined and spliced, they are screwed and fixed by a bolt structure.
7. The electric hoist anti-top collision device according to claim 1, characterized in that: The base is fixedly mounted on the steel wire rope at the fixed tail end of the electric hoist box to be prevented from collision by means of U-shaped bolts.